(19)

(11)

EP 2 220 694 A2

(12)

(88) Date of publication A3: 15.10.2009 (43) Date of publication: 25.08.2010 Bulletin 2010/34 (21) Application number: 08861415.1 (22) Date of filing: 15.12.2008

(51) International Patent Classification (IPC):  H01L 33/00(2010.01) (86) International application number: PCT/IB2008/055316 (87) International publication number: WO 2009/077975 (25.06.2009 Gazette 2009/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 14.12.2007 US 957031 (71) Applicants: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL) Philips Lumileds Lighting Company LLC San Jose, CA 95131 (US)

(72) Inventors: GRILLOT, Patrick N. San Jose, California 95131 (US) ALDAZ, Rafael I. San Jose, California 95131 (US) COBLENTZ, Deborah L.. San Jose, California 95131 (US) MUNKHOLM, Anneli San Jose, California 95131 (US) ZHAO, Hanmin San Jose, California 95131 (US) (74) Representative: Bekkers, Joost J.J  Philips Intellectual Property & Standards P.O. Box 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)